Said  constable



\ i `1 To allkwhom itmay,onoermfy i f a `Be it known that "e,D` VLD A. CONSTABLE M and JOHN F. RIGGS,"ofSt.Joseph, in thecoun-` 1." ty of Buchanan `and State of Missouri, have y `invented afainew and ImprovedSeyving-Mae i chine Motor; Iand we do herebyfdeclare `the followingto bea full, `clear,`a`nd exact `de-1 e i scription of the` same, reference being had to i the` accompanying drawing making a part of i this specitication, in which.- i y `Figurelis a sectional elevation, and Fig. 2 i, .isatopview. i i l i y g This inven fon has for Aitsobject to either ac# celerateor retard the `speed of a sewing-ma.` chine motor `bymeans of bladeshinged to ra-v .i dial arms which project `"from a hub `that is driven by.the,motor,`the.`retardation of the speed of the latter being effected `by opening fthe blades so as to cause them to present more y of their surface to theair, and'thusproduce agreater resistance, andthe acceleration of speed being effected by closing the blades so i. as to diminish that partof `their surface against which the air acts. i y e YReferring tothe drawing`,a `are the blades yaforesaid, they being hinged `to arms bthat a project radially from ahub," c, which is axed upon -a shaft, d, thatis mounted in the shield-` y plates AA.` A pinion, e, on the shaft d gears y with thellast cog-Wheel fof the motor mechanism. A collar, g, slides on the shaft d, said ispivoted in a horizontal stud, i, and inclosed `by a slotted stud, j, both of which extend inwardly from theplate A. @Rods k connect the collar g with the outer edges of the blades a.,

vso that `by vibrating the lever h the blades maybe opened or ,closed for the purpose of either retarding or accelerating the speed of themotor, asdesired. A treadle, l, pivoted at one end .to across-bar, m, placed at the j conm. being Operated by a forked lever, h, that Avln A`. nin)` F. Brees, or sT. JOSEPH, Missonnr 5 f1 if sziinnIeGsssrGNs Hrs* nrenrfro SAID ooNsrABLn.

" lninovMI-:NT1N.swlNe-MAQHINEMQTORS.

spaghetti@ fofming pm of Leners Patent No; 115,436, dated May 3o, 1871.

at its other extremitybyarodpawith a springa brake, o, which is constructed with a concav-` ity,p, that, when the brake is free, sits above the axle g of the third gear of the motor mechanism. By depressing the treadle l the brake o is brought down into contact with the axle g, `for the purpose of retarding the rotation of the same." On releasing the treadle the brake flies up of itself. This apparatus is used for temporarily slowing the speed of the machine ever it may be desired. On the axle r of the axle is a sliding clutch, t, operated by alever, u, said clutchbeing so connected with said lever as to be thereby prevented from turning with theaxle r. Consequently, when the clutch t is slid into connection with the socket s, the Wheel f and the whole motor mechanism are stopped. On. disconnecting the ysocket and clutch the motor startsagain by the operation of the spring fu.

` Having thus described our invention, what We claim as new, and desire to secure by Letters Patent, isi 1. The blades a, hinged and arranged in connection with the Vopening and closing apparatus, and combined With the motor mechanism for sewing,&c., as shown and described, whereby they are adapted to regulate the speed of the machine, as set forth.

2. The combination of the spring-brake o, link n, and treadle lwith a motor mechanism, as described.

3. The apparatus herein described, constructed, arranged, and operating as explained.

v DAVID A. CON STABLE; JOHN F. RIGGS.

Witnesses Y DANIEL CONWAY,

l lower corners ofthe plates A A', is connected Trios. O. DUNCAN.

Whenturningthe corners of the Work, or when- Wheel f is a fixed socket, s, and on the same 

